Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques
Different observation techniques for atmospheric turbulent fluxes of momentum and sensible heat were tested in a High-Arctic valley in Svalbard during two consecutive summers (June-August in 2010 and 2011). The gradient method (GM) and the bulk method (BM) have been compared to the more direct eddy...
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Uppsala universitet, Luft-, vatten- och landskapslära
2014
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Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229634 https://doi.org/10.3402/polar.v33.21567 |
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ftuppsalauniv:oai:DiVA.org:uu-229634 2023-05-15T13:11:32+02:00 Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques Sjöblom, Anna 2014 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229634 https://doi.org/10.3402/polar.v33.21567 eng eng Uppsala universitet, Luft-, vatten- och landskapslära Polar Research, 0800-0395, 2014, 33, s. 21567- http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229634 doi:10.3402/polar.v33.21567 ISI:000338435600001 info:eu-repo/semantics/openAccess Turbulent fluxes Svalbard Arctic observation techniques surface energy budget Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Article, review/survey info:eu-repo/semantics/article text 2014 ftuppsalauniv https://doi.org/10.3402/polar.v33.21567 2023-02-23T21:52:07Z Different observation techniques for atmospheric turbulent fluxes of momentum and sensible heat were tested in a High-Arctic valley in Svalbard during two consecutive summers (June-August in 2010 and 2011). The gradient method (GM) and the bulk method (BM) have been compared to the more direct eddy covariance method (ECM) in order to evaluate if relatively robust and cheap instrumentation with low power consumption can be used as a means to increase the number of observations, especially at remote locations where instruments need to be left unattended for extended periods. Such campaigns increase knowledge about the snow-free surface exchange processes, an area which is relatively little investigated compared to snow-covered ground. The GM agreed closely to the ECM, especially for momentum flux where the two methods agree within 5%. For sensible heat flux, the GM produces, on average, approximately 40% lower values for unstable stratification and 67% lower for stable stratification. However, this corresponds to only 20 and 12 W m(-2), respectively. The BM, however, shows a greater scatter and larger differences for both parameters. In addition to testing these methods, radiation properties were measured and the surface albedo was found to increase through the summer, from approximately 0.1 to 0.2. The surface energy budget shows that the sensible heat flux is usually directed upwards for the whole summer, while the latent heat flux is upwards in June, but becomes downward in July and August. Article in Journal/Newspaper albedo Arctic Polar Research Svalbard Uppsala University: Publications (DiVA) Arctic Svalbard Polar Research 33 1 21567 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Turbulent fluxes Svalbard Arctic observation techniques surface energy budget Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
spellingShingle |
Turbulent fluxes Svalbard Arctic observation techniques surface energy budget Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning Sjöblom, Anna Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
topic_facet |
Turbulent fluxes Svalbard Arctic observation techniques surface energy budget Meteorology and Atmospheric Sciences Meteorologi och atmosfärforskning |
description |
Different observation techniques for atmospheric turbulent fluxes of momentum and sensible heat were tested in a High-Arctic valley in Svalbard during two consecutive summers (June-August in 2010 and 2011). The gradient method (GM) and the bulk method (BM) have been compared to the more direct eddy covariance method (ECM) in order to evaluate if relatively robust and cheap instrumentation with low power consumption can be used as a means to increase the number of observations, especially at remote locations where instruments need to be left unattended for extended periods. Such campaigns increase knowledge about the snow-free surface exchange processes, an area which is relatively little investigated compared to snow-covered ground. The GM agreed closely to the ECM, especially for momentum flux where the two methods agree within 5%. For sensible heat flux, the GM produces, on average, approximately 40% lower values for unstable stratification and 67% lower for stable stratification. However, this corresponds to only 20 and 12 W m(-2), respectively. The BM, however, shows a greater scatter and larger differences for both parameters. In addition to testing these methods, radiation properties were measured and the surface albedo was found to increase through the summer, from approximately 0.1 to 0.2. The surface energy budget shows that the sensible heat flux is usually directed upwards for the whole summer, while the latent heat flux is upwards in June, but becomes downward in July and August. |
format |
Article in Journal/Newspaper |
author |
Sjöblom, Anna |
author_facet |
Sjöblom, Anna |
author_sort |
Sjöblom, Anna |
title |
Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
title_short |
Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
title_full |
Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
title_fullStr |
Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
title_full_unstemmed |
Turbulent fluxes of momentum and heat over land in the High-Arctic summer : the influence of observation techniques |
title_sort |
turbulent fluxes of momentum and heat over land in the high-arctic summer : the influence of observation techniques |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2014 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229634 https://doi.org/10.3402/polar.v33.21567 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
albedo Arctic Polar Research Svalbard |
genre_facet |
albedo Arctic Polar Research Svalbard |
op_relation |
Polar Research, 0800-0395, 2014, 33, s. 21567- http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-229634 doi:10.3402/polar.v33.21567 ISI:000338435600001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3402/polar.v33.21567 |
container_title |
Polar Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
21567 |
_version_ |
1766247843944726528 |